Hack-saw frame



T. CLAFFEY.

HACK SAW FRAME. APPLICATION FILED NOV. 6. 1920.

Patented Aug. 22, 1922.

7770070; 6762 Ffey ATTORNEY WITNES:

.o i THOMAS CLAFFEY, OIE NEW BRITAIN, CONNECTICUT.

HACK-SAW FRAME.

I Specification of LettersPatent. f Patented Aug. 22, 1922.

Application filed November 6, 1920. Serial No. 422,318.

To all whom it may concern:

Be it known that I, THOMAS OLArrnY, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented new and useful Improvements in Hack-Saw Frames, of which the following is a specification.

This invention relates to a non-collapsible hack saw frame, and the object is to provide a device of the type indicated which shall be adapted for retaining it in adjusted position notwithstanding the occasional breaking of the saw blade, and a device in which the clamping elements are adapted for blades of a larger number of sizes than may be employed in the frame of usual construction.

A further object is to provide simplicity in construction throughout, and particularly with reference to the means for retaining the sections of the frame in their adjusted positions, and with reference to the means for obtaining the angular adjustment of the saw blade.

With the foregoing and other objects in view, the invention consists in the novel construction, combination and arrangement of elements hereinafter described and claimed.

In the drawings, Figure 1 is a view of the device in side elevation, with portions broken away; Figure 2 is a detail view in section and elevation, showing an adjusting member; Figure 3 is a detail view of a washer having an inner lug for engagementwith the slotted rod of Figure 2; Figure 4f is a section on the line 4-4 of Figure 1.

In carrying out my invention I provide a pair of frame members 10 and 12, of approX imately the form shown, these elements being adjustably connected by means of a channel. member 14:. The element 14: is provided with a series of notches 15, any one of the end of the rod 21 passing through apertured bracket 19, the outer end of the rod serving to mount the handle 23, Pins 24; and 25 ment 18) pass through this rod on opposite sides of the apertured bracket, one of the pins engaging the notched portion 25 of the bracket.

The opposite end of the blade 20 is secured to the socket end 26 of a bar or red 27, the latter passing throuoh the apertured bracket 18. The element 2? is slotted longitudinally as shown at 28, and is threaded at its outer end.

A disk or washer 29 is provided with a milled edge portion, a projection 29 and a key 29", the key engaging the slot in the element 27 A sleeve 30 is internally threaded at one end, the threads cooperating with the thread of the element 27, and one end of the sleeve is provided with an enlarged bore accommodating a spring 31 bearing against the aforesaid washer or disk. The blades may be adjusted at any angle desired after loosening the element 80 and giving the latter three or four turns. This leaves washer 29 free (after slight movement to the left), except for frictional engagement by the spring, and partial rotation imparted to the washer of course produces similar movement of the blade holding device, by reason of the key and slot connection. Lugs 29' on washer 29 (one of which lugs is shown in Figure 1 as engaging a complementary socket in elemay engage any portion of the end of member 18 and be there retained, if suflicient pressure is applied by sleeve 30. A pin or retaining device 35 passes between the side elements of channel 14 when expanding the frame, and serves to retain the extension against displacement, or complete withdrawal from member 14, by engaging pawl 16. The pin is mounted in element 10 and extends downwardly therefrom, as shown in Figure 1. Figure 2 shows an additional notch 18' in the end of bracket 18, which would be engaged by rotating elements 29 and 27 through an angle of 90 degrees. It may be added that the inner end of the frame member 10 is cut away to form an offset portion or shoulder 37 and an inclined portion 38 cooperating with the complementary portions 39 and 10 of the member 12.

What is claimed is:

In a device of the class described, a plurality of frame elements, and means for mounting a handle and one end of a blade on one of said elements of the frame, means for mounting the other end of the blade on the remaining frame element, said means last named including a 'rotatably mounted her having a longitudinal slot therein, a'bmcket carried by one of the frame elements and apertured for receivingthe her, one end of the bracket being notched, a, Washer including a projection engaging the notch and including an inwardly projecting key engaging the slot in the bar, said her being threaded at one end, a sleeve internally threaded and engaging the threaded por- 10 enclosed by said sleeireybearing against the 'WHShQI, and surrounding the bar at a point 15 adjacent to the Washer. I I

In testimony whereof I aflix my Signature.

" "THOMAS GLAFFEY. 

